Linksys WRT55AG installation?

Hey,

I got a tip that you could install netbsd on a WRT55AG Router[1]. I can 
see on the mips wiki[2] that it is listed as supported hardware.
I'm surprised i was not able to find a blog on installing any bsd/linux 
on it.

Is it something like:
First open up the router to access the serial port.
Then follow the Diskless install[3] and hosting /usr/mdec/boot via tftp 
server route you take?

There is no way to do something similar to [4]?

Otherwise, no one has happend to installed netbsd on a RUTx11[5]? :)
(Completely different, i know, should probably go to the arm mailinglist)

Thanks in advance, keep up the great work!
Best regards

[1] https://techinfodepot.shoutwiki.com/wiki/Linksys_WRT55AG_v2
[2] https://wiki.netbsd.org/ports/evbmips/
[3] https://www.netbsd.org/docs/network/netboot/
[4] 
https://www.harti.ch/harti/spare_time/nslu/NSLU2-Linux%20%20HowTo%20Telnet%20into%20Redboot.pdf
[5] https://techinfodepot.shoutwiki.com/wiki/Teltonika_RUTX11